Crystal

Orgonite Pyramid (containing Amethyst and mixed minerals)

Silicon Dioxide (SiO2) in synthetic resin

Aquamarine

Beryl (Be₃Al₂Si₆O₁₈)

Calcite crystal cluster

Calcite (calcium carbonate, CaCO₃)

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Magnetite (Octahedral Crystal)

Magnetite (Fe3O4)

Amethyst (rough crystal fragment)

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron-related impurities

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Kyanite (Blue or Blue-Grey)

Kyanite (Al2SiO5)

Quartz crystal cluster on matrix

Quartz (silicon dioxide, SiO₂), likely iron-stained or included variety

Quartz (Pink/Rose Quartz or Quartz Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Raw quartz crystal

Quartz (silicon dioxide, SiO₂), likely milky or included quartz

Coquina with Calcite Crystals

Calcareous Bioclastic Grainstone (CaCO3)

Quartz Crystal on Matrix

Silicon Dioxide (SiO2)

Aquamarine

Beryl (Be₃Al₂Si‑₆O₁₈)

Quartz with Chlorite inclusions

Silicon Dioxide (SiO2) with Chlorite group minerals (hydrous magnesium iron alumino-silicate)

Druzy Quartz Geode (likely Smokey Quartz variety)

Silicon Dioxide (SiO2) - specifically a geode formation lined with druzy quartz crystals, with a likely brownish hue indicating smokey quartz.

Rose Quartz

Silicon Dioxide (SiO2)

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz Crystal Cluster on Matrix

Silicon Dioxide (SiO2)

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Druzy quartz geode

Microcrystalline quartz (SiO₂), commonly lining a volcanic geode cavity

Amethyst Cluster

Silicon Dioxide (Quartz variety: Amethyst) - SiO2

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Amethyst (rough crystal fragment)

Purple quartz, silicon dioxide (SiO₂), colored mainly by iron impurities and irradiation

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Garnet-bearing metamorphic rock, likely garnet gneiss or garnet amphibolite

Garnet-bearing gneiss; red crystals likely almandine garnet, Fe₃Al₂(SiO₄)₃

Obsidian

Obsidian (Volcanic Glass)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Carnelian Agate (Tumbled)

Chalcedony (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Epidote in Quartz

SiO2 with Ca2Al2(Fe3+,Al)(SiO4)3(OH)

Calcite (or Alabaster, if truly carved)

Calcium Carbonate (CaCO3)